public class Patrat implements Poligon
{
	private Punct a;
	private Punct b;
	private Punct c;
	private Punct d;
	public Patrat(Punct a,Punct b,Punct c,Punct d)
	{
		this.a=a;
		this.b=b;
		this.c=c;
		this.d=d;
	}
	public double perimetru()
	{
		return 4*a.distanta(b);
	}
	public double arie()
	{
		return a.distanta(b)*a.distanta(b);
	}
	public String toString()
	{
		return "Laturile patratului sunt formate din punctele: "+a+" "+b+" "+c+" "+d;
	}

}
